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His friends have now returned from the resort and are holding a private event for those who knew Callum to share their memories of him at The Foxglove, in Fulmar Close, this Sunday at 5pm.

Callum – known locally as Mario - attended Garibaldi College from 2002 to 2007, and tributes continue to pour in on Facebook, with friends wishing him to "rest in peace" and calling him a "lovely lad".

Police, medics and the Civil Guard were called out and attempts were made to save Callum's life but without success.

Spanish police say they have ruled out foul play, but a full investigation has been launched.